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| Other names | 3α-Hydroxy-5α-estran-17-one; 5α-Estran-3α-ol-17-one |
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| Formula | C18H28O2 |
| Molar mass | 276.420 g·mol−1 |
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19-Norandrosterone, also known as5α-estran-3α-ol-17-one, is ametabolite ofnandrolone (19-nortestosterone) andbolandione (19-norandrostenedione) that is formed by5α-reductase. It is on the list of substances prohibited by theWorld Anti-Doping Agency since it is a detectable metabolite of nandrolone, ananabolic-androgenic steroid (AAS).[1] Consumption ofandrostendione products contaminated with traces of bolandione may also result in testing positive for nandrolone.[2]
Traces of 19-norandrosterone may be naturally present in humanurine. An experiment conducted on athletes showed that after a prolonged intense effort, the 19-norandrosterone concentration can be increased by a factor varying between 2 and 4,[3] but another study failed to replicate the result.[4] Concentration also increases in the urine of female athletes duringmenstruation.[5] The consumption of edible parts of a non-castrated pig, containing 19-nortestosterone, has been shown to result in the excretion of 19-norandrosterone in the following hours, so athletes should prudently avoid meals composed of pigoffal in the hours preceding doping tests.[6] Consumption of boar meat, liver, kidneys and heart also increased 19-norandrosterone output.[7]
